Induction-coil mounting



Patented Sept. 22, 1925. j I 1 UNITED STATES PATENT OFFICE.

HAROLD WILCOX AND PETER S. YONKE, OF SAN FRANCISCO, CALIFORNIA.

INDUCTION-COIL MOUNTING.

Application filed November 22, 1924. Serial No. 751,647.

To all whom it mayconcern: plate is internally threaded as shown at 8,

Be it known that we, HAROLD H. VVILooX .within which is screwed a tube 9 which is and PETER S. YONKE, citizens of the United held against rotation as by a lock washer 11. States and Austria, respectively, residing at Thistube will hereinafter be called the sta- San Francisco, in the county of San Fran tionary tube. 55

cisco and State of California, have invented On this tube is mounted a frame carrying new and useful Improvements in Inductionplate 12 upon which a spider web frame 13 CoilMountings, of which the following is ais positioned. By referring to Figure 2, it specification. will be noted that the plate 12 is provided This invention relates to improvements in with cars 14 and that the frame 13 is pro induction coil mountings and has particular vided with ears 16. This permits the frame reference to a means for mounting so-called being given a partial rotation so that the spider web coils. cars 16 will pass the ears 14:, when it is The principal object of this invention is desired to move one of the coils past one of to produce a simple and efficient means for the plates, for the purpose of changing in- 65 regulating the distance between the coils ducta-nces.

and at the same time maintaining the coils Slidably mounted on the stationary tube parallel with each other. 9 is a collar 17 having a flange 18 corre- Another object is to provide means for sponding to the flange 12 just described, to

20 quickly adjusting the tickler coil and furwhich the inductance frame is also attached. 7 ther providing means for minutely adjust- A slot 19 formed in the stationary tube ing the tickler coil after the first or rough permits a screw 21 to pass therethrough and adjustment has been made. slide therein, which screw enters a block 22,

A till f rth r bj t is to pr d a which block threadedly engages, as at 23, a

25 device of this character which may be attube 24,wh1ch is rotatable on the periphery tached to the ordinary radio panel without the Vernier tube 26- This tubeQl is proaltering the construction of the panel. vided with a recessed collar 27, within which A dditi l bj t i t produce a 1 a screw 28 enters. This screw prevents lati f thi Character hi h may b li d eral movement of the tube, which tube is 30 with the customary dials and knobs thereby rotated y a lml 29 threadedly held thereon adding to the attractiveness of the set, rather at nd locked against rotation by a look than marring it in any way. nut 32.

Other objects and advantages will be ap- The Vernier tube 26 is threadedly engaged parent during the course of the following as at to a knob 3 1 and is held against 35 d ri ti rotation by a lock bushing 36. This tube p In the accompanying drawings forming lsprovided with a bearing 37 substantially a art of thi e ifi atio d i hi h mld way of its length which is grooved to like numerals are employed to designate like I'GCBIVQ e d Of the Screw 38. This screw parts throughout the same, prevents endwise movement of the Vernier 40 Figure 1 is a ertical cross section of my tube. The free end. Of this tube iS screw device, and threaded. as shown at 89 so as to engage a Figure 2 is a, ide elevation of a, pider UI'ZLVBlllIig blOCk 41, which travelling block web coil frame, showing the manner of has P 1 42 c red therein, which pin ti th Same on my d i passes through a slot 43 in the stationary 45' In the accompanying drawings wherein tube for the purpose of illustration is shown a This slot permits lateral movement of the preferred embodiment of our invention, the pin 42, which pin also passes through'a slot numeral 5 designates a panel common in 44 formed in a telescopic tube 46, which ordinary radio sets. To this panel is attelescopes upon an intermediate tube 47,

50 tached a flange plate 6 as by screws 7. This which intermediate tube is slidable upon the end of the stationary tube 9 and the pin 42 passing through the intermediate tube so as to move therewith.

A spring 18 surrounds the pin 12 and contacts the telescopic tube 36 and is compressed by a nut 19 threadedly positioned on the pin 4L2. An adjusting rod 51 is secured to the end of the tube 46 in any con venient manner and passes through the vernier tube 26 to a point outside of the knob 31, where a knob 52 is threadedly secured thereto.

The telescopic tube is provided with a flange 53 to which an inductance frame may be attached.

The operation of our device is as fol; lows Assuming that the parts are in the position shown in Figure 1 and that an inductance frame carrying a primary winding is mounted upon the flange 18, that an, inductance frame carrying a secondary winding is positioned on the flange 12 and that an inductance frame carrying a ticklcr winding is mounted upon the flange and that the operator desires to tune his set, he will then rotate the dial 29 which, in turn, will rotate the tube 24: causing the block 22 to move along the screw thread 23. Due to the fact that the screw 21 cannot rotate, it must necessarily travel in the slot 19. This action causes the primary winding to approach or move away from the secondary winding, depending upon the direction of rotation of the dial 29.

Assuming that the primary and secondary windings have been properly adjusted, the operator then grasps the knob 52 and draws the same away from the knob 34. This causes the telescopic tube 16 carrying the tickler winding to rapidly approach the secondary winding. As it is a very diflicult matter to secure the proper tickler coupling in such a rough manner after an approximate setting has been accomplished, the operator ceases to move the knob 52 and its connected parts and star-ts rotating the knob 34, which rotation rotates the Vernier tube 26, with a result that the screw threads 39 cause the block 11 to move to the right or the left of the drawing, depending upon the direction of rotation of this knob.

As the pin 42 is passed through the slot 43-, the block tl cannot rotate and, consequently, must move longitudinally. As the spring d8 has been inserted over the pin, and the nut 19 tightened, the friction between the spring and the intermediate tube will be suflicient to cause the whole telescopic tube, together with its tickler winding to move with the intermediate tube 4-7. As this movement is very slow it will be readily seen that a very fine or micrometer adjustment may be made.

Thus, it will be noted that we have constructed a device which will mount spider web coils in an eflicient manner and one wherein the coils may be quickly adjusted and at the same time a line adjustment may also be obtained.

It is to be understood that the form of our invention herewith shown and described is to be taken as a preferred example of the same, and that various changes in the shape, size and arrangement of parts may be resorted to without departing from the spirit of the invention or the scope of the subjoined claims.

Having thus described our invention, we claim 1. In a device of the character described, atube, a flange immovably positioned on said tube, and carrying an inductance frame, a second flange slidably positioned on said tube and carrying an inductance frame, arotatable tube positioned in said first mentioned tube, means for preventing lateral movement between said tubes, a block slidably positioned in said first Il'l011- tioned tube, screw threads formed on said second mentioned tube and engaging said block, means for connecting said slidable flange to said block, means for rotating said second mentioned tube, a vernier tube positioned within said second mentioned tube, a third flange slidably held on said first mentioned tube, and means for slidably positioning said third mentioned flange when said vernier tube is rotated.

2. In a device of the character described, a tube, a flange immovably positioned on said tube and carrying an inductance frame, a second flang slidably positioned on said tube and carrying an inductance frame, a rotatable tube positioned in said first men tioned tube, means for preventing lateral movement between said tubes, a block slidably positioned in said [ii-st mentioned tube, screw-threads formed on said second mentioned tube and engaging said block, means for connecting said slidable flange to said block, means for rotating said second mentioned tube, a vernier tube positioned within said second mentioned tube, means for preventing lateral movement of said Vernier tube with respect to said first mentioned tube, means for rotating said tube located on one end of said tube, a screw-thread positioned on the opposite end of said tube, a block engaging said screw-thread, a pin radially positioned in said block and extending through a slot formed in said first mentioned tube, an intermediate tube slidably positioned on said first mentioned tube and engaged by said pin, a telescopic tube slidably positioned on said intermediate tube and having a slot formed therein, through which said pin is adapted to pass,

tension means surrounding said pin and ing from said Vernier tube and having a engaging said telescopic tube, a flange knob secured thereto. formed on said telescopic tube and adapted In testimony whereof We aflix our signa- 10 to have an inductance frame attached there- W to, and means for slidably actuating said telescopic tube, said means comprising a rod HAROLD I-I. WILCOX. attached to said telescopic tube and eXtend- PETER S. YONKE. 

